I plan on running around 9psi, daily on my B16 w/ the Hondata system.
I got the walbro intank, and RC 440s.

Is having a Vortech 1:1 FMU really necissarry? or will I be fine w/ out it?
and other than that, am I good to go, or is there something I'm missing on my shopping list?

 

i believe you get rid of the vortech w/ the hondata. anyone else?

 

yeah I dumped the 12:1, but I have read about using a 1:1 rate FMU

 

I am a little unclear on this as well. I think since it is just a 1:1, it may be alright if you omit it. I am not sure on this, maybe try emailing Doug at Hondata ot Tom Payne.

 

i am using the AEM regulator which is 1:1 and it works fine. i think you should be ok with the vortech.

 

thing is, I sold the vortech, so I am wondering if it is Necissary to use one at all.

 

Dont get confused with a FMU and fuel regulator.
fuel regulator.


FMU

 

The 1:1 regulator is to maintain a constant pressure differential between the fuel pressure and boost pressure. Ie, at vacuum (20 inches aka -10 psi), your fuel pressure is 34 psi (2000 Civic Si). The "overall" pressure is 44psi. At atmospheric pressure (0 inches/0 psi of boost), the stock FPR will ramp the pressure up to 44 psi, so the "overall" pressure is still 44psi.

People report different results with the stock Honda FPR. Some say that it will continue to rise at 1:1 under boost. Some (like me) say that it will not. I think it varies on the year/model of the car. I've tested 4 99+ Civic Si's and 1 2000 ITR and none of them have had their fuel pressure rise under boost.

So, the answer is...it depends. Do some testing of your own and find out if your fuel pressure rises under boost with the stock FPR. If it does not, get the AEM or Vortech 1:1 unit because most tuners use the 1:1 FPR making map trades easier and it's just good practice for the reason I wrote in the first paragraph.

Sonny

 

Thank you sonny.

art

 

are all the regulators like vortech, aem, b&m etc 1:1 ?

 

Be careful when you're shopping around because it is easy to mix up terms and get what you don't want.

The B&M, Vortech, NOS, etc "adjustable fuel pressure regulators" simply chop the top off of your stock FPR and replace the top with an adjustable unit. They will not change your FPR's characteristics (ie, will it rise under boost?). They all look like this:



The AEM FPR is a completely new FPR. That is why it is expensive compared to the above. It will rise 1:1 under boost (what you want). It looks like this:



Vortech also makes a 1:1 FMU that piggybacks the stock FPR:



My personal preference is the AEM FPR. I think it is the cleanest solution.

Sonny

 

If you have a gauge in the engine bay, one way to test it is to hook up an air compressor with a nozzle to the vacuum hose, make sure its only putting out 10psi or so, then you'll know if it rises or not. My stock regulator rises under boost.

 

I didnt know Vortech made a 1:1 FMU.

art

 

My stock fpr is 1:1 above atmospheric as verified using a Autometer full sweep fuel pressure. 1998 Prelude.

I went to the Aeromotive when I changed to SS lines and aftermarket rail. The Aeromotive is exactly the same as the Paxton and SX, just cheaper.

Sorry, dark picture: http://www.higginstribe.com/gallery/...?image=fpr.jpg

 

Thanks Sonny

 

so basically your saying that if you get an AEM pressure reg you won't need the vortech FMU that comes with a drag turbo kit?

 

For hondata, Yes
For a normal Drag kit, No

 

Holley also has a 1:1 fpr that bolts on to the stock fuel rail. Hope that helps.

 

so whats the difference? even if i have 440 cc injectors?....... i mean i am getting a hondata, but i'm unclear what the hondata does thats different TIA

 

Someone post me a link on where to get the AEM 1:1 I can't find it anywhere.

I have seen adjustable regulators, but no 1:1 FMU?

am I understanding this wrong. per the earlier post it said I need the FMU, but the idea I get from hondata's website, and through doing a search here is that I just need a regulator, ie the B&M...what gives.

 

You can get the AEM FPR from Landspeed Racing.

http://www.landspeedracing.com

That's where I got mine. Good service.

Sonny